Maxon GPT-25 User manual

M-13-10
REV. A
JANUARY 2014
OPERATION MANUAL
GPT-25, GPT-3, GPT-4, GPT-5; GPTWR-25, GPTWR-3, GPTWR-4
& GPTWR-5
© MAXON Lift Corp. 2014

TABLE OF CONTENTS
WARNINGS............................................................................. 4
LIFTGATE TERMINOLOGY .................................................... 5
RECOMMENDED DAILY OPERATION CHECKS.................. 6
DECALS (GPT MODELS) ....................................................... 8
DECALS (GPTWR MODELS) ................................................. 10
FORKLIFT ADVISORY............................................................ 12
ROADSIDE OPERATION ADVISORY.................................... 13
OPERATION ........................................................................... 14
USING CART STOPS (IF EQUIPPED) ................................... 22

4
1. Incorrect operation of this Liftgate can result in serious personal
injury. Comply with WARNINGS and Liftgate operating instructions
in this manual. Do not allow untrained persons or children to operate
the Liftgate. If you need to replace an Operation Manual, additional
copies are available from:
MAXON Lift Corp.
11921 Slauson Ave
Santa Fe Springs, CA 90670
[phone]
WARNING
!
NOTE: For latest version manuals (and replacements), down-
load manuals from Maxon’s website at www.maxonlift.com.
2. Do not exceed rated load capacity of the Liftgates, which is
2500 lbs. for the GPT-25 & GPTWR-25, 3000 lbs. for the GPT-3 &
GPTWR-3,4000 lbs. for the GPT-4 & GPTWR-4,& 5000 lbs. for
the GPT-5 & GPTWR-5.
4. Consider the safety and location of bystanders and
location of nearby objects when operating the Liftgate. Stand
to one side of platform while operating the Liftgate. Be certain
that the area the Liftgate will move through during operation
is clear of all obstacles.
5. Comply with all attached instruction decals and warning decals.
11. Above all, USE GOOD COMMON SENSE when operating the
Liftgate.
8. Do not move vehicle unless Liftgate is correctly stowed.
6. Keep decals clean and legible. If decals are illegible or missing,
have them replaced. Get free replacement decals from Maxon.
7. Never drive a forklift on the Liftgate platform.
10. A correctly installed Liftgate will operate smoothly and reasonably
quiet. The only noticeable noise, during Liftgate operation, is from
the power unit while the platform is raised. Listen for scraping,
grating and binding noises and have the problem corrected
before continuing to operate the Liftgate.
9. Correctly stow platform when not in use. Extended platforms
could create a hazard for people and vehicles passing by.
12. Never use a cell phone while operating the Liftgate.
3. Do not allow any part of your body to be placed under, within, or
around any portion of the moving Liftgate or its mechanisms, or in
a position that would trap them between the platform and the floor
of truck body (or between platform and the ground) when Liftgate is
operating.
WARNINGS

5
LIFTGATE TERMINOLOGY
WEDGE FLIPOVER LIFT ARM
TORSION
SPRING
PLATFORM
PARALLEL
ARM MAIN
FRAME
PUMP ASSY
(COVER IS
SHOWN)
CONTROL
SWITCH
PLATFORM
OPENER
LICENSE PLATE
BRACKET
EXTENSION PLATE
(GPT MODEL
SHOWN)
LIFT
CYLINDER
DUAL
STEP
BUMPER

6
RECOMMENDED DAILY OPERATION CHECKS
Make sure battery is fully charged and battery terminal connections are
clean and tight.
Visually check that pump cover is bolted on securely and undamaged.
Look for hydraulic fluid leaking from the pump box.
Before operating the Liftgate, the operator should do the following:
Visually check that control switch is in place and undamaged.
Use the operation instructions in this manual to lower the Liftgate to
the ground and open the platform and flipover.
Check main frame, lift arms, parallel arms and platform openers for
cracks and bends. Make sure rollers, on the platform openers, roll
freely. Also, make sure all bolts and pins are in place and undamaged.
Visually check for cracks and bends on the extension plate. Also, make
sure fasteners are in place and undamaged and extension plate is
clean (no oil, debris, or corrosion).
Check the hydraulic cylinders for leaking seals and hose connections.
Follow the hydraulic hoses (or return lines for gravity down Liftgates)
from the cylinders to pump box. Make sure all hoses are connected at
both ends and there are no cracks, chafing, and fluid leaks.
Make sure main frame, lift arms, parallel arms and platform openers
are clean (no oil, debris, or corrosion).
Visually check that all decals are in place (see DECALS page). Make
sure decals are legible, clean, and undamaged.
NOTE: Before you check the Liftgate, park vehicle on flat ground
and set the parking brake.
NOTE: If any of the following operation checks reveal a need to
service or repair Liftgate, do not operate the Liftgate until a
qualified mechanic services or repairs the Liftgate.
Make sure cab cutoff switch is ON, if equipped.

7
Check the platform and flipover for cracks, holes, and bends on the
load-carrying surface and side plates. Also, make sure torsion bars,
coil springs, and fasteners are in place and undamaged.
Make sure platform and flipover load-carrying surfaces are clean (no
oil, debris, or corrosion).
Use the operation instructions in this manual to operate the Liftgate
through one cycle without a load on the platform. Raise the platform
to vehicle bed height. Next, lower the platform to ground level.
When the Liftgate is moving, listen for unusual noises and look for a
“jerking” motion or uneven movement on either side of the platform.
If service or repairs are not required (or if completed), stow the Lift-
gate.
With the platform unfolded
and raised to bed level,
check if the outboard
edge of platform is level
or rises up to 1” above
bed level (YES illustra-
tion). If the outboard
edge of platform looks
like the YES illustration,
you can operate Liftgate.
If the outboard edge of
platform is below level
line and platform looks
like the NO illustra-
tion, do not operate the
Liftgate. (See NOTE at
beginning of the DAILY
OPERATION CHECKS.)
YES
NO
LEVEL LINE
OUTBOARD EDGE
0” (LEVEL) - 1” MAX.
VEHICLE
FLOOR (REF)
EXTENSION
PLATE (REF)
LEVEL LINE
VEHICLE
FLOOR (REF)
EXTENSION
PLATE (REF)

8
DECALS (GPT MODELS)
DECAL “C”
DECAL “A”
DECAL “D”
DECAL “E”
DECAL “F”
DECAL “B”
DECAL “G”
DECAL “H” (2 PLACES)
PLATFORM WARNING DECAL
(2 PLACES)
P/N 281189-01 PLATFORM LOADING DECAL
(2 PLACES)
P/N 281326-01
PAINT DECAL
P/N 267338-01
SERIAL PLATE
(REF)
NOTE: Ensure there is no residue, dirt or corrosion
where decals are attached. If necessary,
clean surface before attaching decals.
STOW WARNING DECAL
P/N 282847-02
FAMILY OWNED DECAL
P/N 283445-01

9
DECAL SHEET
FIG. 9-1
DECAL SHEET
TABLE 9-1
(See TABLE 9-1)
MODEL DECAL SHEET P/N DECAL “B”
GPT-25 282848-01 2500 POUNDS
GPT-3 282848-02 3000 POUNDS
GPT-4 282848-03 4000 POUNDS
GPT-5 282848-04 5000 POUNDS

10
DECALS (GPTWR MODELS)
PLATFORM LOADING DECAL
(2 PLACES)
P/N 281326-01
DECAL “H”
DECAL “F”
DECAL “D”
DECAL “E”
DECAL “I”
DECAL “C”
DECAL “B”
DECAL “G”
PLATFORM WARNING DECAL
(2 PLACES)
P/N 281189-01
PAINT DECAL
P/N 267338-01
SERIAL PLATE
P/N 905246-2
DECAL “A”
NOTE: Ensure there is no residue, dirt or corrosion
where decals are attached. If necessary,
clean surface before attaching decals.
STOW WARNING DECAL
P/N 282847-02

11
DECAL SHEET
FIG. 11-1
DECAL SHEET
TABLE 11-1
MODEL DECAL SHEET P/N DECAL “B”
GPTWR-25 282849-03 2500 POUNDS
GPTWR-3 282849-01 3000 POUNDS
GPTWR-4 282849-04 4000 POUNDS
GPTWR-5 282849-05 5000 POUNDS

12
FORKLIFT ADVISORY
WARNING
!
Keep forklift OFF of platform.
FIG. 12-1

13
Operating the Liftgate by the side of a busy road with vehicle traffic
increases the chance of personal injury and damage to Liftgate,
cargo & vehicle. Making the loading area more visible to passing
traffic can help reduce the chance of injury and damage.
WARNING
!
ROADSIDE OPERATION ADVISORY
NOTE: MAXON recommends placing at least 2 traffic cones on the traffic
side of the platform loading area as illustrated below. Remove
cones after platform is stowed and before moving the vehicle.
TRAFFIC CONES POSITIONED BY PLATFORM LOADING AREA
(GPT LIFTGATE SHOWN)
FIG. 13-1
VEHICLE TRAFFIC
APPROACHING
FROM THIS SIDE

14
OPERATION
TRUCK EQUIPPED WITH WALK RAMP & GPTWR LIFTGATE
(LIFTGATE SHOWN STOWED &
RAMP SHOWN DEPLOYED)
FIG. 14-1
NOTE: On vehicles equipped with the GPTWR, see the manufacturer’s
instructions to use walk ramp. Follow all the WARNINGS &
CAUTIONS that apply to the walk ramp.

15
1. Standing to the side of
platform (FIG. 15-1A),
pressurize hydraulic sys-
tem by pushing the toggle
switch to UP position for
2 seconds FIG. 15-1B.
2. Lower the platform until it
touches the ground. Unfold
platform (FIG. 15-2).
Never operate control switch
while unfolding platform.
UNFOLDING PLATFORM
FIG. 15-2
FIG. 15-1A
FIG. 15-1B
WARNING
!
PLATFORM

16
3. Unfold the flipover (FIG. 16-1).
UNFOLDING FLIPOVER
FIG. 16-1
FIG. 16-2C
FIG. 16-2B
RAISING & LOWERING PLATFORM
FIG. 16-2A
4. Raise the platform (FIG. 16-2A) by pushing the toggle switch to the UP
position (FIG. 16-2B). Wait a second before releasing the toggle switch,
after platform reaches bed height. To lower the platform, push the toggle
switch to the DOWN position (FIG. 16-2C).
NOTE: While operating the Liftgate, release the toggle switch
to stop the platform.
OPERATION - Continued
FLIPOVER

17
5. Load the platform at ground
level as shown in FIG. 17-1.
LOADING PLATFORM AT GROUND LEVEL
FIG. 17-1
WARNING
!
6. Raise the platform to bed
level (FIG. 17-2). Move
load from platform to inside
the vehicle body.
UNLOADING PLATFORM AT BED LEVEL
FIG. 17-2
A load should never extend past the edges of the platform. Do not
place unstable loads on platform and do not allow load to exceed
the lifting capacity of the Liftgate. If standing on platform, do not
allow your feet to extend beyond the inboard edge of the platform.
INBOARD
EDGE
LOAD
PLATFORM
LOAD
PLATFORM
VEHICLE
BODY

18
LOADING PLATFORM AT BED LEVEL
FIG. 18-1
7. Load the platform at bed level
as follows. Push load out of the
vehicle to correct position on
the platform (FIG. 18-1).
Place all loads as close as
possible to the inboard edge
of the platform with heaviest
part toward the vehicle body
as shown in FIG. 18-1. If
standing on platform with the
load, stand in the footprint area
shown and comply with the
WARNING on the previous
page.
Pulling the load from vehicle to platform can result in a fall from
platform and cause serious injury. When unloading vehicle,
always push the load out on the platform.
WARNING
!
PLATFORM AT GROUND LEVEL
FIG. 18-2
8. Lower the platform to ground
level (FIG. 18-2). Move load
off the platform (FIG. 18-2).
OPERATION - Continued
PLATFORM
VEHICLE
BODY
INBOARD
EDGE
LOAD
PLATFORM
INBOARD
EDGE
LOAD

19
10. Stow the platform by doing
the following. Raise the plat-
form 2” above the ground
(FIG. 19-2A) by pushing
the toggle switch to the UP
position (FIG. 19-2B).
RAISING LIFT
FIG. 19-2A
LOWERING LIFT
FIG. 19-1A
FIG. 19-1B
FIG. 19-2B
Never move the vehicle unless the Liftgate is properly stowed.
9. Before moving the vehicle,
prepare the Liftgate as
follows. Make sure load is
removed from platform. If
the platform is at bed height,
push the toggle switch to the
DOWN position as shown in
FIG. 19-1B. Release toggle
switch when platform touches
the ground (FIG. 19-1A).
WARNING
!

20
11. Fold the flipover (FIG. 20-1).
NOTE: Before folding flipover, make sure cart stops are stowed (if
equipped).
Keep hands clear of the platform support when folding flipover.
WARNING
!
12. Fold the platform as shown in
FIG. 20-2.
FOLDING PLATFORM
FIG. 20-2
Keep hands clear of the extension plate when folding the plat-
form under the extension plate.
WARNING
!
UNFOLDING PLATFORM
FIG. 20-1
OPERATION - Continued
FLIPOVER